The AMD Ryzen 9 7900X3D wins in 7 out of 14 comparable specs, with 2 ties. Its biggest advantage is L3 Cache (327% better).
Core Ultra 7 265K wins in 5 specs (L2 Cache: 200% better).
Recommendation
Choose Ryzen 9 7900X3D if you want the best overall performance — especially l3 cache.
Choose Core Ultra 7 265K if l2 cache matters more to you.
